rai

In Thailand, ? – 21st century, a unit of
land area, by the Weights and Measures Act B.E. 2542 (1999) = 1,600 square meters (approximately 1,914 square yards or 0.40
acre).¹ It is one square sen. It is not used
for paddy fields. Abbreviation, r.

Ordinarily, foreigners cannot own land in Thailand. However, a foreigner who
invests 40 million baht in Thailand and receives “Board of Investment” approval
may be allowed to own up to 1 rai of land in their own name.